You guys are disingenuous when you’re talking about the cost factor or the time.
Not at all. I have helped setup dozens of DIY packs over the last decade. The average size pack is 400ah/48V.
It takes less than a day for most people to assemble the packs.
For comparison, the most readily available commercial LiFePO4 packs available here over that period were BYD B-Box.
Every single BYD i know of that was professionally installed has given issues, generally after a few years.
The trend i see is like this:
step one: install ill-informed system based on advice from shop (shops here still recommend lead acid)
step two: a few years later get that system replaced by a “professional” install
step three: a few years later get that system replaced by a DIY system that actually works properly.
I get regular contact from people with commercial systems that nobody will help them with as the installer has disappeared.
Once someone understands the basics of their DIY system it is simple for them to troubleshoot.
The DIY system is technically a lot simpler also. If i use a commercial rack mount system (eg BYD) i would have 8 extra BMS that could fail.
The commercial offerings look attractive, you need to speak with people that have owned them for many years to get the picture.